Surface Mount Fuses Ceramic Fuse > 440 Series 440 Series, 1206 High I2t Fuse RoHS Pb Description The 440 Series is a 100% Lead-free, RoHS compliant and Halogen-free fuse series designed specifically to provide over-current protection to circuits that operate under high working ambient temperatures up to 150ºC and high inrush currents. The general design ensures excellent temperature stability and performance reliability. This high I2t fuse series is designed to have ultra high inrush current withstand capability to avoid nuisance fuse open. Features • Operating Temperature from -55ºC to +150ºC • 100% Lead-free, RoHS compliant and Halogen-free • Ultra high I2t values Agency Approvals AGENCY • Suitable for both leaded and lead-free reflow / wave soldering AGENCY FILE NUMBER AMPERE RANGE E10480 .25A - 8A 29862 .25A - 8A Applications • LCD Displays •Scanners •Servers • Data Modems • Notebook Computers • Hard Disk Drives •Printers Electrical Characteristics for Series Additional Information % of Ampere Rating Ampere Rating 100% 0.25A - 8A 4 hours, Minimum 350% 0.25A - 8A 5 secs., Maximum Opening Time at 25ºC Datasheet Resources Samples Electrical Specifications by Item Ampere Rating (A) Amp Code Max. Voltage Rating (V) 0.25 0.375 0.5 0.75 1 1.25 1.5 1.75 2 2.5 3 3.5 4 5 7 8 .250 .375 .500 .750 001. 1.25 01.5 1.75 002. 02.5 003. 03.5 004. 005. 007. 008. 125 125 63 63 50 50 50 32 32 32 32 32 32 32 32 32 Nominal Nominal Nominal Voltage Nominal Power Agency Approvals Interrupting Rating Resistance Melting I2t Drop At Rated Dissipation At 1 (AC/DC) (Ohms)2 (A2Sec.)3 Current (V)4 Rated Current (W) 50 A @ 125 V AC/DC 50 A @ 63 V AC/DC 50 A @ 63 V AC/DC 50 A @ 50 V DC 50 A @ 50 V AC 50 A @ 32 V AC/DC 2.140 1.216 0.8140 0.4624 0.3096 0.2265 0.1759 0.0450 0.0385 0.02850 0.02252 0.01845 0.01553 0.0120 0.00753 0.00634 Notes: 1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting Rating tested at rated voltage with time constant < 0.8 msec. 2.Nominal Resistance measured with < 10% rated current. 3.Contact Littelfuse if application transient surges are less than 1 ms. 4.Nominal Voltage Drop measured at rated current after temperature has stabilized. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 05/15/15 0.00649 0.01455 0.02642 0.09312 0.21054 0.379 0.50652 0.3312 0.4326 0.8191 1.232 1.789 2.601 4.761 8.464 12.95 0.5260 0.4993 0.4831 0.3983 0.3457 0.3240 0.3215 0.0777 0.0792 0.0747 0.0742 0.0757 0.0709 0.0654 0.0696 0.0655 0.132 0.187 0.242 0.299 0.346 0.405 0.482 0.136 0.158 0.187 0.223 0.265 0.284 0.327 0.487 0.524 x x x x x x x x x x x x x x x x X X X X X X X X X X X X X X X X Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See “Temperature Derating Curve”for additional derating information. Devices designed to be mounted with marking code facing up. Surface Mount Fuses Ceramic Fuse > 440 Series Temperature Rerating Curve Average Time Current Curves 100 120 100 10 80 60 40 -65 -45 -25 -5 15 35 55 75 95 115 135 155 TEMPERATURE (°C) TIME IN SECONDS PERCENT OF RATING 140 1 0.1 Note: 1. Rerating depicted in this curve is in addition to the standard derating of 20% for continuous operation. 0.01 Example: For continuous operation at 75 degrees celsius, the fuse should be derated as follows: I = (0.80)(0.85)IRAT = (0.68)IRAT 0.001 0.1 1.0 10.0 100.0 1000. CURRENT IN AMPERES Soldering Parameters Pb-free assembly Pre Heat - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 seconds Average Ramp-Up Rate (Liquidus Temp (TL) to peak) 3°C/second max. TS(max) to TL - Ramp-up Rate 5°C/second max. Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds 260 Time within 5°C of actual peak Temperature (tp) 10 – 30 seconds tL Ramp-down TS(min) Preheat tS time to peak temperature (t 25ºC to peak) Time °C Ramp-down Rate 6°C/second max. Time 25°C to peak Temperature (TP) 8 minutes max. Do not exceed 260°C Wave Soldering Critical Zone TL to TP Ramp-up TL TS(max) 25 Peak Temperature (TP) +0/-5 tP TP Temperature Reflow Condition 260°C, 10 seconds max. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/15/15 Surface Mount Fuses Ceramic Fuse > 440 Series Product Characteristics Materials Body: Advanced Ceramic Terminations: A g / Ni / Sn (100% Lead-free) Element Cover Coating: Lead-free Glass Moisture IPC/JEDEC J-STD-020, Level 1 Sensitivity Level Solderability IPC/ECA/JEDEC J-STD-002, Condition C Humidity Test MIL-STD-202, Method 103, Conditions D Resistance to Solder Heat MIL-STD-202, Method 210, Condition B Dimensions Moisture Resistance MIL-STD-202, Method 106 Thermal Shock MIL-STD-202, Method 107, Condition B Mechanical Shock MIL-STD-202, Method 213, Condition A Vibration MIL-STD-202, Method 201 Vibration, High Frequency MIL-STD-202, Method 204, Condition D Dissolution of Metallization IPC/ECA/JEDEC J-STD-002, Condition D Terminal Strength IEC 60127-4 Part Marking System 3.200 ± .1778 [.126 ± .007] X 1.000 [.039] 1.63 + .10/ -.20 [.064 + .004/ -.008] .8179 +.046/ -.076 [.0322 +.0018/ -.003] TERMINATION Amp Code .250 .375 .500 .750 001. 1.25 01.5 1.75 002. 02.5 003. 03.5 004. 005. 007. 008. Marking Code D E F G H J K L N O P R S T W X Part Numbering System 0440 008. W R 0.520 ± .200 [.020 ± .008] SERIES 1.000 [.039] 1.500 [.059] AMP CODE 1.800 [.071] QUANTITY CODE W = 3000 pcs 3.500 [.138] PACKING CODE R = Reel Pack Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA-481, IEC 60286, Part 3 3000 WR © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/15/15